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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 739 · 40 questions
TalentJR

How to do it in your head ((a + b)²): Split: 27 = 20 + 7. Find 20² = 400, 2 × 20 × 7 = 280 and 7² = 49. Add, biggest first: 400 + 280 + 49.

NameDateTime takenScore ___ / 40
  1. 1.23² =
  2. 2.22² =
  3. 3.24² =
  4. 4.29² =
  5. 5.27² =
  6. 6.28² =
  7. 7.21² =
  8. 8.11² =
  9. 9.14² =
  10. 10.13² =
  11. 11.12² =
  12. 12.19² =
  13. 13.16² =
  14. 14.25² =
  15. 15.17² =
  16. 16.18² =
  17. 17.15² =
  18. 18.26² =
  19. 19.23² =
  20. 20.29² =
  21. 21.12² =
  22. 22.29² =
  23. 23.21² =
  24. 24.17² =
  25. 25.12² =
  26. 26.11² =
  27. 27.21² =
  28. 28.23² =
  29. 29.23² =
  30. 30.11² =
  31. 31.27² =
  32. 32.29² =
  33. 33.21² =
  34. 34.29² =
  35. 35.11² =
  36. 36.19² =
  37. 37.24² =
  38. 38.19² =
  39. 39.12² =
  40. 40.24² =

Answer key

  1. 529
  2. 484
  3. 576
  4. 841
  5. 729
  6. 784
  7. 441
  8. 121
  9. 196
  10. 169
  11. 144
  12. 361
  13. 256
  14. 625
  15. 289
  16. 324
  17. 225
  18. 676
  19. 529
  20. 841
  21. 144
  22. 841
  23. 441
  24. 289
  25. 144
  26. 121
  27. 441
  28. 529
  29. 529
  30. 121
  31. 729
  32. 841
  33. 441
  34. 841
  35. 121
  36. 361
  37. 576
  38. 361
  39. 144
  40. 576

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